BL manga similar to 'MADK'???
So you mean like guro BL?
Check out https://www.mangago.me/read-manga/feeding_lamb/ or anything else by Nishin Masumi
Also Ogawa’s https://www.mangago.me/read-manga/monster_throne/
This list has a buncha good recommendations too https://www.mangago.me/home/mangalist/556570/
Welp that was bittersweet ending....